How do birth control pills prevent pregnancy?

Doctor's Answers (1)

Dr Christopher Ng

"More than 20 years of obstetrics and gynaecology experience"

First and foremost, the primary contraception action of the oral contraceptive pill is that they prevent ovulation of an egg from the ovary. The oral contraceptive pills also change the nature of the cervical mucus especially during the fertile period by making it more hostile to sperm survival and motility. Finally, the oral contraceptive pills thin the endometrial lining making it harder for an embryo to implant. The oral contraceptive pills are very effective (as long as you are taking them correctly as instructed) and are associated with a low failure rate.

If you are older than 35 years and smoke, have a history of blood clots or breast cancer, it may be advisable that you not to take the pill as the risk of deep venous thrombosis is higher.

Health on the Net Foundation

This site complies with the HONcode standard for trustworthy health information: verify here.

© 2020 DoctorxDentist PTE LTD. All rights reserved.

All content posted is for general informational purposes only and is not a substitute for professional medical advice. This Q&A is not a patient consultation and any information provided herein is not intended to replace consultation with a qualified medical professional. If you think you may have a medical emergency, call your doctor immediately. Always seek the advice of your doctor before starting or changing treatment.

Quote RequestWhatsapp